Wizards

#Pratchat3 – You’re a Wizzard, Rincewind

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In episode three, comedian Cal Wilson is back to discuss the book that started her passion for Terry Pratchett – Sourcery! It’s the fifth Discworld novel, published in 1989, and both revisits locations and characters from the first two books and takes us to new parts of the Disc.

Happy to have left his adventuring days behind him, inept “wizzard” Rincewind now works as assistant librarian at Unseen University, the Disc’s premiere college for wizards. But just as a new archchancellor is about to be named, a young boy arrives. Coin is the eighth son of an eighth son of an eighth son: a Sourcerer, a source of raw magic not seen on the Disc since the ancient time of the Mage Wars. As Coin takes over the university and wizards across the world awaken to power they’ve never known, the end of the world draws nigh…and Rincewind just can’t seem to avoid getting involved.

Rincewind was Pratchett’s first protagonist, and this novel exemplifies all the things that make us love him: genre-awareness, unrepentant cowardice, reluctant heroism, lack of any skill at wizardry and fierce self-identification as a wizard. It also sees the return of the Luggage, a living chest which follows Rincewind wherever he goes. It was a delight for us all to see these characters again, and we have grand plans to go back to their beginnings in the very first Discworld novels…

In the meantime, when you’ve finished listening to this episode, get ready for the next one by reading Wyrd Sisters! We’ll be recording on January 14th, so get your questions in ASAP if you’d like us to answer them on the podcast.

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Guest Cal Wilson (she/her) was a stand-up comedian and children’s author. She previously appeared in our first episode, “Boots Theory“. At the time of publishing Cal was about to tour a new live stand-up show, Hindsight, in multiple cities at festivals throughout 2018. (You can see the poster she mentions in our episode notes.) Cal passed away unexpectedly after a brief illness in October 2023; she is sorely missed.

You can find the full notes and errata for this episode on our web site.

Want to help us get to the end of our six(ish) year mission and read every Pratchett book – and more? You can support us with a tip, or a subscription for as little as $2 a month, and that’s cuttin’ our own throats! See our Support Us page for details.

#Pratchat55 – Mr Doodle, the Man on the Moon

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It’s an illustrated Discworld crossover special as Georgina Chadderton rejoins Liz and Ben to talk gods, dragons and outer space in the twenty-seventh Discworld novel, 2001’s The Last Hero, illustrated by Paul Kidby.

Genghiz Cohen, Emperor of the Agatean Empire, has deserted his throne, and along with his horde is heading for the mountain at the hub of the world. He is planning to pay a little visit on the gods, and “return what the first hero stole” – with explosive interest. According to the wizards, this will destroy the source of the Disc’s magic and thus end all life on (and under) it. A rag-tag team of misfits is quickly assembled – a dangerously genius inventor, a stout and honest officer of the Watch, and a reluctant “wizzard” – to take a risky flight looping around the Disc, and intercept Cohen before its too late…

The second large-format illustrated Discworld novel, The Last Hero – subtitled “A Discworld Fable” – is a relatively short story, but crosses the streams of the various sub-series more than any other book, providing Paul Kidby with the chance to showcase a whole host of characters and places – including the Disc as seen from above and below! It both feels like a throwback to some of the earlier books – the whole world at stake, Rincewind and Cohen on wild Disc-crossing adventures, the gods playing games with mortals – and a fitting last hurrah (more or less) for two of Pratchett’s most beloved characters.

Is this a fitting send-off for Cohen? What’s happening in the Agatean Empire now its Emperor is gone? How many hours have you spent poring over the illustrations finding references, in-jokes and Easter eggs? And what do you imagine the minstrel’s saga sounds like? Join the conversation using the hashtag #Pratchat55 on social media.

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Guest Georgina Chadderton (aka George Rex) is a comic book creator and illustrator based in Adelaide. She was last our guest way back in #Pratchat7 in 2018 to talk about the first illustrated Discworld novel, Eric. Since then she’s continued to make delightful autobiographical comic (including her upcoming book), run comic-making workshops, organise the Papercuts Comics Festival, and even found the time to create the cover art for Pratchat! You can find her online at georgerexcomics.com, where you can find out about Georgina’s upcoming events and also buy all manner of cool comics, postcards and stickers. You can also follow her on Instagram at @georgerexcomics.

As usual, you can find notes and errata for this episode on our website.

Over the next two months we’re returning to Pratchett’s sci-fi work. In June, we’re discussing his 1990 short story “ifdefDEBUG + ‘world/enough’ + ‘time’” with science fiction author Sean Williams. That’ll leave us (and you) a bit of extra reading time before July for the third Long Earth novel, The Long Mars, which we’ll be discussing with our old friend Joel Martin! But in the meantime, you can send us your questions for the short story using the hashtag #Pratchat56, or via email to chat@pratchatpodcast.com.

Want to help us get to the end of our six(ish) year mission and read every Pratchett book – and more? You can support us with a tip, or a subscription for as little as $2 a month, and that’s cuttin’ our own throats! See our Support Us page for details.

#Pratchat56 – do { Podcast(); } while (unreadPratchetts > 0);

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We travel down a leg of a very 1990s pair of the trousers of time this month, as author and musican Sean Williams joins Liz and Ben to get stuck into the artificial reality of Pratchett’s 1990 short story “#ifdefDEBUG + ‘world’/’enough’ + ‘time’“.

Darren Thompson is a repairman who specialises in Seagems: artificial reality consoles that can edit aspects of your everyday life, or plug you into a whole artificial world. His latest job is to inspect a machine in which the user has died. That’s not a first for Darren – but there’s something about this particular corpse in the machine that makes this job feel different…

Originally published in the anthology Digital Dreams alongside works by authors including Diana Wynn Jones, Neil Gaiman and Storm Constantine, “#ifdefDEBUG + ‘world’/’enough’ + ‘time'” is a short story that packs a lot in – and potentially goes to a much darker place than most of Pratchett’s other work. It’s since been collected in A Blink of the Screen, Once More* *with Footnotes and the German collection Der ganze Wahnsinn: Storys (in which it’s accompanied by an original illustration by Josh Kirby).

Was Pratchett right to think that the virtual reality angle dates this horribly – or would he have thought differently only a few years later, as VR comes round again? Is this a happy ending, a dystopian nightmare, or the fantasy ramblings of a self-important creep? Would you want to be a ghost in the machine? And just what is going on with that illustration in the German collection? Join the conversation using the hashtag #Pratchat56 on social media.

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Guest Dr Sean Williams is an award-winning author of science fiction novels and short stories, makes music under the name “the Adelaidean”, and teaches creative writing at Flinders University. His novels run the gamut of original sci-fi and best-selling work for the worlds of Star Wars and Doctor Who, and he’s also collaborated with other authors – including previous Pratchat guest Garth Nix (#Pratchat51). You can find out more about Sean via his (hopefully updated) website, seanwilliams.com, and listen to his music via his Bandcamp page. He’s also (sometimes) on Twitter at @adelaidesean.

As usual, you can find notes and errata for this episode on our website.

Next month we continue the sci-fi theme with the third Long Earth novel, The Long Mars, which we’ll be discussing with returning guest Joel Martin! Send us your questions using the hashtag #Pratchat57, or via email to chat@pratchatpodcast.com.

Want to help us get to the end of our six(ish) year mission and read every Pratchett book – and more? You can support us with a tip, or a subscription for as little as $2 a month, and that’s cuttin’ our own throats! See our Support Us page for details.

#Pratchat58 – The Barbarian Switch

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We explore every author’s worst nightmare as writer Penny Love returns to Pratchat and finds the barrier between reality and fiction getting all wibbly-wobbly in Terry Pratchett’s 1988 short story, “Final Reward“.

After a particularly bad row with his girlfriend Nicky – and a pint of wine – author Kevin Dogger decides to kill off the protagonist of his best-selling fantasy series. The next morning, Erdan the Barbarian appears on Dogger’s doorstep with the milk. He was, after all, promised a final reward: an eternity of carousing in the halls of his creator…

Content note: the story “Final Reward” contains discussion of (fictional) suicide.
If you or anyone you know needs help, use the Wikipedia list of crisis lines to find one local to you.

Written for the short-lived roleplaying magazine G.M., “Final Reward” is Pratchett’s go at the age-old tradition of writers writing about writers. But in true Pratchett form, it’s not just about that… Hailing from around the time of Wyrd Sisters and Pyramids, but “tinkered with” before appearing in A Blink of the Screen, it depicts an author ill at ease with the real world and human relationships – by all accounts not much like Pratchett himself at all. And then there’s the way it ends…

What did you think of this one? Have you ever written a character you’d like to meet in person? Would you swap places with them? And is this a dig at any real fantasy authors, and we’ve missed the joke? Join in the conversation using the hashtag #Pratchat58 on social media.

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Guest Penelope Love is a writer best known for her roleplaying game work, especially with Chaosium for Call of Cthulhu, including the upcoming Victorian London campaign she mentions this episode. She previously joined us for #Pratchat45, “Hogswatch in Grune“, discussing the quite Lovecraftian “Twenty Pence with Envelope and Seasonal Greeting”. Penny is also part of Campaign Coins, who as well as making gorgeous metal coins for use with tabletop games, publish Penny’s comic fantasy short story collections about “The Three Dungeoneers”, which you can find here. Penny is on Twitter as @PennyLoveWrites, or you can follow @CampaignCoins for more on their projects.

As usual, you can find notes and errata for this episode on our website.

As previously advised, due to some technical difficulties – and not a time machine, to Ben’s disappointment – the next episode to be released will be #Pratchat57, discussing the third Long Earth novel, The Long Mars, with Joel Martin. Look for it in the Pratchat podcast feed on August 25.

Next month in #Pratchat59, we’re discussing The Science of Discworld III: Darwin’s Watch with science and fiction writer, Dr Kat Day! And after that, in October, it’s finally time for another general questions episode, #Pratchat60. This is the perfect opportunity to ask us about books you missed first time round, or general questions about Discworld, Pratchett, us and the show! Send in your questions for either of those episodes via social media (using the appropriate hashtag), or send us an email at chat@pratchatpodcast.com.

Want to help us get to the end of our six(ish) year mission and read every Pratchett book – and more? You can support us with a tip, or a subscription for as little as $2 a month, and that’s cuttin’ our own throats! See our Support Us page for details.

#Pratchat63 – Decline by Committee

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In this final fourth part of our Thud! trilogy, Liz and Ben are rejoined by designer and educator Matt Roden. As we wait for the biscuits to arrive, we turn our attention to this month’s agenda items: the 2005 Discworld short story “A Collegiate Casting-Out of Devilish Devices”, and squeezing in a bit more discussion of Thud!

Every Thursday the senior faculty of Unseen University have a committee meeting, during which they do very little except wait for the biscuits and tea to arrive – much to the annoyance of Ponder Stibbons. But this week, Ridcully announces that their latest magical mishap has annoyed the Patrician – and as a result, they have a few questions to answer from one A. E. Pessimal, newly appointed “Inspector of Universities”...

Written for the Times Higher Education Supplement and published a few months before Thud!, this very short story draws on Pratchett’s own experience on a committee. Does it tally with yours? Are you a Ponder, a Ridcully, or a Pessimal? Do you agree with Matt’s characterisations of the other faculty members? Plus we get back into Thud! – are we off the mark with our thoughts about whether it’s copaganda? What is Pratchett trying to say about religious extremism, if anything? And what Discworld cocktail would you make? Join the conversation using the hashtag #Pratchat63.

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Guest Matt Roden was here just two months ago for #Pratchat61 discussing Thud! He is still the Creative Learning Manager for the Museum of Contemporary Art Australia, as well as an accomplished graphic designer and educator. There are now even more photos of his dog on his Instagram at @matthewrodeo.

You’ll find notes and errata for this episode on our web site.

We’re easing into the year slowly with another short story for February, this time one of Pratchett’s earliest: “Rincemangle, the Gnome of Even Moor” from his time at the Bucks Free Press in 1974. Its available in both A Blink of the Screen and The Witch’s Vacuum Cleaner. Send us your questions about it using the hashtag #Pratchat64, or via email, which you can send to chat@pratchatpodcast.com.

Oh, and don’t forget to check out the all-new Pratchat Reading Challenge for 2023! All the details are on our website, and you’ll also find it on the StoryGraph.

Want to help us get to the end of our six(ish) year mission and read every Pratchett book – and more? You can support us with a tip, or a subscription for as little as $2 a month, and that’s cuttin’ our own throats! See our Support Us page for details.

#Pratchat71 – It Belongs in a University

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Liz and Ben are blessed by two returning guests, the Rev Dr Avril Hannah-Jones and Dr Charlotte Pezaro, as they go on one last visit to Roundworld – this time as clerics, wizards and librarians clash over who should take ownership. It’s Terry Pratchett’s fourth and final collaboration with Ian Stewart and Jack Cohen, 2013’s The Science of Discworld IV: Judgement Day.

Ponder Stibbons has just activated Unseen University’s latest “Great Big Thing”, the culmination of six years’ research (and spending) into the frontiers of magical knowledge. It summons a side effect: improbably-named librarian Marjorie Daw, from the even less probable universe in a bottle, Roundworld. Marjorie decides to stick around when she discovers her entire universe is under threat: the Church of the Latter-Day Omnians, who believe the Disc is round, think Roundworld should be theirs. After surviving elves and Auditors, will it be lawyers and priests who decide Roundworld’s fate?

This time in the (really short!) fiction chapters, the wizards barely visit Roundworld at all; Ridcully spends most of his time talking to Marjorie, before the last few chapters detail the trial – sorry, hearing – of the century. In the non-fiction chapters, Jack and Ian do talk about science…but mostly about religion. Their big idea this time revolves around Gregory Benford’s ideas of human- and universe-centred thinking. As the fiction pits priests against wizards, you can probably see where this is going. We certainly could, and we’ll be blunt: we didn’t like it.

Is this really a book about science? How do the authors’ ideas of “religion” gel with yours – or even Pratchett’s previous books and writing on the subject? What did you think of Marjorie Daw? Do you want us to do a special episode with Avril about Scott Morrison’s book? And were we too harsh on this book? Join in the conversation using the hashtag #Pratchat71 on social media.

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Guest Rev Dr Avril Hannh-Jones (she/her) is a Minister in the Uniting Church. While she should be known for her tireless activism for marginalised communities, most people know her for the Church of the Latter Day Geek: an occasional service where science fiction and fantasy stories serve as parables, and cosplay is allowed in the pews. Avril previously appeared on Pratchat back in 2019 to discuss Small Gods in #Pratchat16. Avril posts weekly Reflections on her blog, Rev Doc Geek, tweets as @DocAvvers, and would love to see you at a Sunday service at North Balwyn Uniting Church.

Guest Dr Charlotte Pezaro (she/her) is an educator with a PhD in pedagogy and years of experience communicating science and technology, and shaping how it is taught in Australian schools. She last joined us in 2021 for #Pratchat41 to discuss Nation, which is both Charlotte’s and Pratchett’s favourite Pratchett book. You can find out more about Charlotte at charlottepezaro.com, or her education work at dialogic.com.au.

As usual, you can find notes and errata for this episode on our website.

Next episode it’s time for another short story: this time a young adult one Pratchett wrote for Diana Wynn Jones in 1989, “Turntables of the Night”. It was originally published in the anthology Hidden Turnings, but you’ll most easily find it in Pratchett’s short fiction collection A Blink of the Screen. We’ll be discussing this tale of record collectors and DJs with superstar DJ and comedian, Andrew McClelland! Have a read and send us your questions using the hashtag #Pratchat72, or via email to chat@pratchatpodcast.com.

Want to help us get to the end of our six(ish) year mission and read every Pratchett book – and more? You can support us with a tip, or a subscription for as little as $2 a month, and that’s cuttin’ our own throats! See our Support Us page for details.

#Pratchat59 – Charlie and the Whale Factory

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Scientist, writer and editor Dr Kat Day joins Liz and Ben on a timey-wimey to Roundworld, as the wizards once again try to save humanity in Terry Pratchett’s third collaboration with Ian Stewart and Jack Cohen: 2005’s The Science of Discworld III: Darwin’s Watch.

Roundworld – the impossibly non-magical universe in a bottle which runs on rules – has gone wrong again, and the wizards feel duty-bound to set it right. Humanity’s survival depends on the publication of a specific book, but something is trying very hard to make sure its author writes a different one…or gets eaten by a giant squid. With the fate of humanity hanging in the balance, the wizards go to war – but who is their hidden enemy? And why is there one beardy fellow too many in the Great Hall?

In the (short) fiction chapters, the wizards must once again travel into Roundworld history, this time with a clear mission: to get Charles Darwin onto the Beagle so he can write The Origin of Species. In the science chapters, Jack and Ian have a focus – the importance of the theory of evolution – but they also feel free to use the time travel plot to explain infinity, DNA, the nature of science and history, and much more besides. They’ve learned to stay away from the cutting edge – but have they come entirely out of the “philosopause” they didn’t seem to know they were in last time?

Does the plot rely too much on prior knowledge of the Discworld? Is that really a problem, given the nature of the book? Did you follow the explanations of Minkowski spacetime and the different kinds of infinity, or were you happy coasting across the science chapters? Do they completely miss the point in that last non-fiction chapter – and does it really matter, when the end of the fiction part is so satisfying? Join in the conversation using the hashtag #Pratchat59 on social media!

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Guest Dr Kat Day (she/her) is a chemist, a former teacher, a medical editor and a writer of both science and fiction. Kat became well known via her chemistry blog The Chronicle Flask, which is currently on hiatus; you can also find her fiction at the fiction phial. Kat is also an assistant editor for Pseudopod, the horror fiction anthology podcast from Escape Artists. Kat recommended the story “Celestial Shores” as a possible entry point for Pratchett fans, as well as “Let the Buyer Beware” from Pseudopod’s sister podcast for young adult speculative fiction, Cast of Wonders. Over on Twitter you can follow Kat at @chronicleflask, and Pseudopod at @pseudopod_org.

As usual, you can find notes and errata for this episode on our website.

Next episode Pratchett turns sixty! As promised back in #Pratchat30, we’re doing another all-questions episode. This is your chance to send in questions about books you missed first time round, pitch your wild Discworld theories, and ask us pretty much anything you like that doesn’t fit into the usual book-focussed episode. We’d also love you to answer our questions: what are do you enjoy most about the show? What kind of episodes do you wish we’d do? Which of our opinions have you most disagreed with? And have you learned anything from us? (Ben sure has!) Send us your answers, and questions, using the hashtag #Pratchat60, or via email to chat@pratchatpodcast.com.

Oh, and in November, get ready for a double-header: not only are we reading Thud! with educator Matt Roden for #Pratchat61, but we’re cooking up a bonus crossover episode! Yes, we’re teaming up with Jo and Francine from The Truth Shall Make Ye Fret, another great Pratchett podcast, to discuss Where’s My Cow?, the hottest children’s book in Ankh-Morpork. We thought we’d let you know a little early, since it might be tricky to track down a copy…

Want to help us get to the end of our six(ish) year mission and read every Pratchett book – and more? You can support us with a tip, or a subscription for as little as $2 a month, and that’s cuttin’ our own throats! See our Support Us page for details.

#Pratchat71 Notes and Errata

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These are the episode notes and errata for Pratchat episode 71, “It Belongs in a University”, discussing Terry Pratchett’s 2013 collaboration with Ian Stewart and Jack Cohen, The Science of Discworld IV: Judgement Day, with guests Rev Dr Avril Hannah-Jones and Dr Charlotte Pezaro.

Iconographic Evidence

This is the video from the Waterstones event for the launch of the fourth book, with Terry talking about Charles Darwin and The Origin of Species.
This is the Eye of Magnus, the magical Great Big Thing from the videogame The Elder Scrolls V: Skyrim, which Ben immediately thought of while reading the descriptions of Ponder Stibbons’ “Challenger Project”.

Notes and Errata

  • The episode title echoes Indiana Jones’ famous (and very colonialist) line, “It belongs in a museum!” Thankfully the wizards didn’t steal Roundworld from anyone…but if you want to know how this sort of thinking affects people in the colonised countries, we’d recommend Marc Fennel’s podcast (and television series) Stuff the British Stole.
  • The term “philosopause” is referred to in The Science of Discworld II: The Globe, where Jack and Ian describe it as when “elderly scientists … stop doing science and take up not very good philosophy instead”. They didn’t coin the term; it dates back to at least 1996, and probably earlier.
  • Gregory Benford (1941-) is both an influential science fiction author and a physicist, but not a qualified theologian or philosopher. The first source footnoted in the book is the one for Benford’s idea of human- and universe-centred thinking, and it’s “a creature of double vision”, from Science Fiction and the Two Cultures: Essays on Bridging the Gap Between Science and the Humanities, edited by Gary Westfahl and George Slusser, McFarland Publishers 2009, pages 228-236.
  • The book review referred to by Liz is Timothy Snyder’s “Is the Human Impulse to Tell Stories Dangerous?”, a review of The Story Paradox by Jonathan Gottschall. The tweet that stuck in Liz’s mind was by Michael Chinigo.
  • Epistemology is the philosophy of knowledge: how do we know what we know, and what qualifies a belief as knowledge?
  • Liz has talked about “hounding the germ man to death” before; you can hear her talk about Semmelweis in #Pratchat48 (about Thief of Time) and #Pratchat54 (Night Watch). As on those occasions, we recommend this episode of NPR’s Shortwavepodcast to get a good short version of his struggle to just get doctors to wash their hands in a time when no-one believed in germs.
  • L-Space is originally described as a distortion of space into “poly-fractal L-Space”. While the Librarian frequently travels through L-Space, it’s not presented as a “space” where things exist, but a way to travel through space and time. Books create L-Space.
  • Narrativia as a Discworld goddess pre-dates this book by a couple of years, Pratchett having named her – and commissioned a statue of her – in 2011, as detailed in this Guardian article. This does seem to be her first appearance in fiction, though the production company Narrativia, which holds the media licensing rights to his works, was formed in 2012.
  • Charlotte recommended Bill Bryson’s 2003 book A Short History of Nearly Everything, as well as Pratchett’s own Nation. Avril recommended Marilynne Robinson’s 2016 collection The Givenness of Things: Essays.

More notes to come soon!

Thanks for reading our notes! If we missed anything, or you have questions, please let us know.

#Pratchat47 – A Finite Number of Shakespeares

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Science comedian and public health nerd Alanta Colley joins Liz and Ben on their second trip through Discworld into Roundworld. It’s Terry Pratchett’s second collaboration with Ian Stewart and Jack Cohen: 2002’s The Science of Discworld II: The Globe.

While on a team-building exercise in the woods near Unseen University, Archchancellor Mustrum Ridcully and his faculty are accidentally swept along when something makes its way through the Discworld into Roundworld. That something turns out to be elves – nasty, parasitic lifeforms who feast on the imagination and emotions of others. Roundworld – the universe in a bottle created by the wizards’ experiments, which somehow runs without any magic – has been altered by their presence. Now the wizards – including Rincewind, the long-suffering Egregious Professor of Cruel and Unusual Geography – have to find a way to get rid of them without dooming the local human population in the process…

Having entirely missed humankind in The Science of Discworld, the wizards are back for another go! And so are science writers Ian Stewart and Jack Cohen – but this time, they don’t want to explain cosmology, basic physics and the history of the Earth, but instead sell you on the idea that storytelling is the essential ingredient that makes humans…human.

Are we really Pans narrans, the storytelling chimpanzee, rather than Homo sapiens, the “wise man”? Is it wise to write a popular science book with an author who will guarantee the book will be read again twenty years later – and to include some “cutting edge” science, no less? What do a debunked psychological experiment, the term “overcommitment”, and filthy explanations of fairytales have to do with it? And who’s this shrewd and world-wise street wizard named Rincewind, and can we have some more of his adventures please? Let us know what you think using the hashtag #Pratchat47 on social media, and join in the conversation!

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Guest Alanta Colley (she/her) is a comedian, science communicator and storyteller whose solo shows include Parasites Lost (about parasites), Days of Our Hives (about beekeeping) and The Origin of Faeces (you can probably work that one out yourself). She also wrote and performed the “comedy experiment” You Chose Poorly with our own Ben McKenzie. Since 2017 Alanta has also been the host and producer of Sci Fight, a series of comedy science debates; both Ben and Liz have been guest speakers, along with previous Pratchat guests Anna Ahveninen (#Pratchat35) and Nicholas J Johnson (#Pratchat38). You can hear Ben and Anna’s last appearance on Sci Fight in this episode of the Climactic podcast, or see the first online debate for Melbourne Science Gallery on YouTube here. Visit scifight.com.au to sign up to the mailing list, and you can find Alanta as @lannyopolis on Twitter and Instagram, via Facebook or at alantacolley.com.

You can find out more about what Liz has been writing by following her as @ElizabethFlux on Twitter or Instagram.

As usual, you can find notes and errata for this episode on our web site.

Next episode we read one of the few precious Discworld novels left to us, though luckily we got a little preview this time around; yes, we’re joining up with Susan, Death and the history monks for the very timely Thief of Time, which we’ll be discussing with journalist Ben Riley! Send us your questions using the hashtag #Pratchat48, or get them in via email: chat@pratchatpodcast.com

Want to help us get to the end of our six(ish) year mission and read every Pratchett book – and more? You can support us with a tip, or a subscription for as little as $2 a month, and that’s cuttin’ our own throats! See our Support Us page for details.

#Pratchat35 – Great Balls of Physics

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Liz, Ben and science communicator Anna Ahveninen have the weird sensation of being a specimen in a jar as they discuss Terry Pratchett’s 1999 collaboration with biologist Jack Cohen and mathematician Ian Stewart, The Science of Discworld.

Research wizard Ponder Stibbons splits the magical equivalent of the atom, but the experiment fills Unseen University with dangerous raw magic. To use it up, sentient thinking machine Hex initiates “the Roundworld Project” – the creation of a reality devoid of magic. This universe in a bottle has no narrative imperative, only one kind of light, and not a single star turtle. What it does have are rocks, flaming balls of gas and rules. This all seems very unnatural to the wizards, so there’s only one thing to do: poke it with a stick and see what happens…

After reading one too many “Science of Star Trek” books, science writers and Pratchett fans Jack and Ian joined forces with Sir Terry to write a book in which they would use the wizards’ exploration of a bottle universe to explore our own, and the science that explains it. The concept was a bit of a gamble, and no-one wanted to publish it at first, but it proved a big hit, spawning three sequels. The Science of Discworld concentrates on the beginning and evolution of the universe and the history of life on Earth, with plenty of asides about the nature of science and how it is taught (including the now famous concept of “lies-to-children”). In between these essays, the Unseen University wizards poke our own “Roundworld” with a big stick and try to make sense of a world without magic – in part by forcing Rincewind into the role of virtual astronaut.

What did you learn from The Science of Discworld? Do you enjoy the alternating fantasy and science chapters? How does it compare to the other “The Science of” books? And does the science still stand up, eighteen years after the revised edition of 2002? Use the hashtag #Pratchat35 on social media to join the conversation!

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Guest Anna Ahveninen is a science communicator, writer and (ex) chemist who currently works at the Australian Academy of Science. You can follow her on Twitter at @Lady_Beaker. Anna also wanted to give a shout out to the STEMMinist Book Club (the second M is for Medicine), who you can also find on Twitter at @stemminist, and on Goodreads.

Turns out we jumped the gun a little with Collisions – the Liminal magazine fiction anthology won’t be published until November! We’ll remind you in a couple of episodes.

Next month it’s back to the Ramtops for our favourite coven’s last hurrah, as Lancre is invaded by vampires in Carpe Jugulum! We’ll be joined by actor, singer and cabaret star Gillian Cosgriff. Get your questions in via social media using the hashtag #Pratchat36, or send us an email at chat@pratchatpodcast.com.

You’ll find the full notes and errata for this episode on our web site.

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